Multitech

Creation procedure

Import steps

1. Payload Management → Sensor Definitions → Import Manufacturer: MClimate  Sensor Type: XX XX - the specific name of the sensor you are currently importing

2. Select both files:

   • mclimate-aqi-codec.js

   • mclimate-aqi-definition.json

3. Click Import, then Save & Apply – the gateway will create read-only Input objects for telemetry and writable Value objects for every "downlink": true property.

Take note the example file below ends with 2 lines, that are the "decoder", "encoder" variable names. These are an example and need to match the names you have given them when actually importing them in the Multitech Gateway.

In order for the BACnet integration to work, you would need to import both the code below for the Codec file (in the form of a JS file) and the code for the Definition file after it (in the form of a JSON file).

Multitech BACnet Codec file

// DataCake
function Decoder(bytes, port){
    var decoded = decodeUplink({ bytes: bytes, fPort: port }).data;
    return decoded;
}

// Milesight
function Decode(port, bytes){
    var decoded = decodeUplink({ bytes: bytes, fPort: port }).data;
    return decoded;
}

// The Things Industries / Main
function decodeUplink(input) {
    var bytes = input.bytes;

    function calculateBatteryVoltage(byte) {
        return byte * 8 + 1600;
    }

    function calculateTemperature(rawData) {
        return rawData / 10.0;
    }

    function handleKeepalive(bytes, data) {
        // Byte 1: Device battery voltage
        var batteryVoltage = calculateBatteryVoltage(bytes[1]) / 1000;
        data.batteryVoltage = Number(batteryVoltage.toFixed(1));

        // Byte 2: Thermistor operational status and temperature data (bits 9:8)
        var thermistorConnected = (bytes[2] & 0x04) === 0; // Bit 2
        var temperatureHighBits = bytes[2] & 0x03; // Bits 1:0

        // Byte 3: Thermistor temperature data (bits 7:0)
        var temperatureLowBits = bytes[3];
        var temperatureRaw = (temperatureHighBits << 8) | temperatureLowBits;
        var temperatureCelsius = calculateTemperature(temperatureRaw);
        data.thermistorProperlyConnected = thermistorConnected;
        data.temperature = Number(temperatureCelsius.toFixed(1));

        // Byte 4-6: Counter data
        var counter = ((bytes[4] << 16) | (bytes[5] << 8) | bytes[6]);
        data.counter = counter;

        // Byte 7: Status and event code
        var status = bytes[7]
        var events = { '01': 'keepalive', '32': 'reed switch', '33': 'push button' }
        var eventKey = (bytes[0] < 10 ? '0' : '') + bytes[0].toString()
        var event = events[eventKey]
        
        data.status = status;
        data.event = event;

        return data;
    }

    function handleResponse(bytes, data) {
        var commands = bytes.map(function (byte) {
            return ("0" + byte.toString(16)).substr(-2);
        });

        commands = commands.slice(0, -8); 
        var command_len = 0;

        commands.forEach(function (command, i) {
            switch (command) {
                case '04':
                    command_len = 2;
                    var hardwareVersion = commands[i + 1];
                    var softwareVersion = commands[i + 2];
                    data.deviceVersions = { hardware: Number(hardwareVersion), software: Number(softwareVersion) };
                    break;
                case '12':
                    command_len = 1;
                    data.keepAliveTime = parseInt(commands[i + 1], 16);
                    break;
                case '19':
                    command_len = 1;
                    var commandResponse = parseInt(commands[i + 1], 16);
                    var periodInMinutes = commandResponse * 5 / 60;
                    data.joinRetryPeriod = periodInMinutes;
                    break;
                case '1b':
                    command_len = 1;
                    data.uplinkType = parseInt(commands[i + 1], 16);
                    break;
                case '1d':
                    command_len = 2;
                    var wdpC = commands[i + 1] === '00' ? false : parseInt(commands[i + 1], 16);
                    var wdpUc = commands[i + 2] === '00' ? false : parseInt(commands[i + 2], 16);
                    data.watchDogParams = { wdpC: wdpC, wdpUc: wdpUc };
                    break;
                case '1f':
                    command_len = 1;
                    data.sendEventLater = parseInt(commands[i + 1], 16);
                    break;
                default:
                    break;
            }
            commands.splice(i, command_len);
        });
        return data;
    }

    var data = {};

    if (bytes[0] === 1 || bytes[0] === 32 || bytes[0] === 33) {
        data = handleKeepalive(bytes, data);
    } else {
        data = handleResponse(bytes, data);
        // Handle the remaining keepalive data if required after response
        bytes = bytes.slice(-8);
        data = handleKeepalive(bytes, data);
    }

    return { data: data };
}

Multitech BACnet Definition file

{
  "description": "MClimate Open/Close Sensor (Open/Close Sensor) – BACnet mapping",
  "properties": {

    "batteryVoltage"             : { "type": "float",  "units": "V"        },
    "thermistorProperlyConnected": { "type": "bool"                        },
    "temperature"                : { "type": "float",  "units": "celsius" },
    "counter"                    : { "type": "uint32"                      },
    "status"                     : { "type": "uint8"                       },
    "event"                      : { "type": "string"                      },

    "deviceVersions"             : { "type": "object"                      },
    "keepAliveTime"              : { "type": "uint8",  "units": "minutes"  },
    "joinRetryPeriod"            : { "type": "float",  "units": "minutes"  },
    "uplinkType"                 : { "type": "uint8"                       },
    "watchDogParams"             : { "type": "object"                      },
    "sendEventLater"             : { "type": "uint8"                       }
  },

  "decoder": "mclimate-open-close-sensor-codec.js",
  "encoder": "mclimate-open-close-sensor-codec.js"
}